| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
5.8%
|
| 0 | Less than one day | 11 |
9.2%
|
| 1 | 16 |
13.3%
|
|
| 2 | 22 |
18.3%
|
|
| 3 | 17 |
14.2%
|
|
| 4 | 4 |
3.3%
|
|
| 5 | 4 |
3.3%
|
|
| 6 | 1 |
0.8%
|
|
| 7 | 10 |
8.3%
|
|
| 8 | 1 |
0.8%
|
|
| 9 | 1 |
0.8%
|
|
| 10 | 4 |
3.3%
|
|
| 14 | 6 |
5%
|
|
| 15 | 1 |
0.8%
|
|
| 20 | 1 |
0.8%
|
|
| 28 | 2 |
1.7%
|
|
| 30 | 5 |
4.2%
|
|
| 40 | 1 |
0.8%
|
|
| 60 | 2 |
1.7%
|
|
| 62 | 1 |
0.8%
|
|
| 65 | 1 |
0.8%
|
|
| 75 | 1 |
0.8%
|
|
| 180 | 1 |
0.8%
|
|
| Sysmiss | 282 |